钻孔孔壁坍塌掉块现象的分析研究及处理

Research and Treatment of Borehole Walls’ Collapse and Landslide Accidents

分析了在复杂地层钻进过程中钻孔孔壁坍塌掉块事故发生的原因、征兆及特点 ,提出了该种事故的预防措施 ,并指出采用特殊泥浆、套管隔离。

Based on a real case study and a general cause analysis for the accidents of borehole wall's landslide and collapse, which frequently occur in drilling in complex strata, an effective solution by resorting to special slurry, casing off and cement injection is proposed.